Computational modeling of nano-enhanced protective layers for museum artifacts

It is a dynamic behavior of nano-enhanced annular protective layers that are based on a visco-Pasternak-based fractional foundation, which is computationally examined in an attempt to enhance vibration mitigation and durability of museum objects. This paper discusses the synergistic effect of the nanoscale size effects, surface elasticity, foundation damping, and geometric attributes on the dynamic behavior of the protective layers. Differential Quadrature (DQ) method is used to solve the governing equations which allows effective numerical calculation of dynamic deflection and frequency response. Findings indicate that size-dependent material behavior complements the effective stiffness of the nano-layers and changes the vibration amplitudes due to intrinsic effects of length scale, and surface stresses add to further reduction of dynamic deflections, especially in ultra-thin coating. The parameters of viscoelastic foundation particularly damping and shear stiffness are great in dissipation of energy and damping of vibration during dynamic excitations. It is found in parametric analyses that there are strong interactions between geometry, nanoscale mechanics, and support conditions, and key mechanisms that facilitate structural stability and vibration control. The results are useful in the design of light-weight non-intrusive and vibration-resistant nano-engineered protective layers to conserve delicate museum artifacts.